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Casting molding process and machining process classification

by:BoQiao Machinery     2020-12-21
The casting molding process: 1. Gravity casting, sand casting, die casting. Relying on its own gravity metal poured the molten metal liquid into the cavity. 2. Pressure casting, low pressure casting, pressure casting. Rely on additional pressure to press the molten metal liquid instantly into casting mould. Casting process: (1) cast ( Make liquid metal solid casting container) Preparation, casting according to the materials can be divided into sand mold, metal, ceramic, mud, graphite, etc. , can be divided by use disposable, semi permanent and permanent type, mold preparation quality are the main factors influencing the casting quality; (2) cast metal melting and pouring, casting metal ( Casting alloy) Mainly include all kinds of cast iron, cast steel and casting of non-ferrous metals and alloys; (3) casting processing and inspection, foreign body casting processing including removal of core and the casting surface, remove poured riser, shovel grinding burrs and phi seam protruding content and heat treatment, such as plastic, rust and rough machining and so on. The casting process can be divided into three basic parts, namely, cast metal preparation, mold preparation and casting processing. Casting metal refers to the casting of metal materials used for pouring castings in production, it is a kind of metal elements as the main components, and join other metal or nonmetal elements and composition of the alloy, traditionally known as the casting alloy, mainly has cast iron, cast steel and nonferrous alloy casting. Metal smelting is not only a pure melt, include smelting process, the metal poured into the mold, in terms of temperature, chemical composition and purity are expected requirements. Therefore, in the process of smelting are going to have to check the test and quality control for the purpose of all kinds of liquid metal in the provisions to rear can allow gating. Sometimes, in order to meet the higher requirements, in the introduction to the liquid metal processing outside the furnace, such as desulfurization, vacuum degassing, refining outside the furnace, pregnant or modification treatment, etc. Metal smelting of commonly used equipment cupola and electric arc furnace, induction furnace, resistance furnace, furnace, etc.
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